+ifeq "$(RelocatableBuild)" "YES"
+# On Windows we want to make moveable bindists, but we need to tell
+# ghc-pkg where the haddock docs are. Therefore we completely ignore
+# where the user tells us to put the haddock documentation and put it
+# somewhere whose relative location we know. When installing we need
+# to give Cabal a real path, though.
+iprefix = $$topdir
+ibindir = $$topdir
+ilibdir = $$topdir
+ilibexecdir = $$topdir
+idynlibdir = $$topdir
+idatadir = $$topdir
+idocdir = $$topdir/doc/libraries/$$pkg
+ihaddockdir = $$topdir/doc/libraries/$$pkg
+ihtmldir = $$httptopdir/doc/libraries/$$pkg
+html_installed_root = $(prefix)/doc/libraries
+else
+# On non-Windows we can just give absolute paths all the time, and
+# thus obey the htmldir that we are given.
+iprefix = $(prefix)
+ibindir = $(bindir)
+ilibdir = $(libdir)
+ilibexecdir = $(libexecdir)
+idynlibdir = $(dynlibdir)
+idatadir = $(datadir)
+idocdir = $(docdir)/libraries/$$pkg
+ihaddockdir = $(htmldir)/libraries/$$pkg
+ihtmldir = $(htmldir)/libraries/$$pkg
+html_installed_root = $(htmldir)/libraries
+endif